Rivet set



H. w, YOUNG I RIYET SET Filed April 10, 1944 f W D'W YOu/z g BY v/ Patented Nov. 13, 1945 UNITED STATES PATENT xOFFijCE RIVET SET Harold W. Young, Maywood, Calif.

Application April 10, 1944, Serial No. 530,438

4 Claims.

This invention relates to and has for an object the provision of an improved rivet set by means of which ends of rivets are upset and formed so as to clinch the rivets when they are used for holding plates together. Heretofore rivet sets have been formed of a single piece of forged metal having stems arranged to be detachably held in the chuck or holder of a riveting machine, with a flange which serves to limit the thrust of the rivet set relative to the machine, and a shank on the end of which is formed the set proper adapted to engage the protruding ends of the rivets. v

Hence, when the operative end of the rivet set is damaged by continued use it is customary to discard the unit and substitute another therefor, thereby causing a substantial loss of vital materials.

It is an object of this invention to provide a conventional form of tool which will not occasion any changes in the machine to which it is applicable for use but which provides a separate rivet setting head applicable to the conventional body of the tool and firmly held on the body but detachable therefrom when it becomes worn or inefficient.

Thus, the tool of my invention embodies a con-- ventional holder and a separate riveting head rigidly but detachably supported thereon, and, more particularly includes means for frictionally holding the riveting head on the body against displacement during the use f the tool. Other objects may appear as the description progresses;

I have shown a preferred form of tool in the accompanying drawing, subject to modification, within the scope of the appended claims, without departing from the spirit of my invention. In said drawing:

Fig. 1 is a side view of the assembled tool;

Fig. 2 is an enlarged fragmentary view of the same showing the tool shank and the riveting head in section as when arranged in operative positions; and

Fig. 3 is a cross sectional view of the tool on line 3-3 of Fig. 1.

A rivet set of conventional character is of integral form and includes a stem I adapted to be fixedly held in a chuck or holder of a. riveting machine, an annular flange 2 intermediate the ends of the tool against which the end of a chuck may engage so as to limit the thrust of the tool in the direction of the chuck, and a shank 3 coaxial with stem I and flange 2 on the end of which a rivet upsetter 4 is usually formed for engagement with the protruding ends of rivets in setting operations by means of which heads are formed on the rivets for holding adjacent parts together.

My invention consists in the provision of a separate head 5 on the operative end of shank 3 which is adapted to be detachably but rigidly supported on said shank and to operate in the same manner as though it were an integral part of the shank. To such end I provide the body of head 5 with a diameter corresponding to that of the shank3 and a reduced stem 6 which tightly fits a bore 1 of shank 3. The head 5 has the usual rivet setting die 4 on its outer end and a shoulder 8 which abuts the end of shank 3. The outer portion of the shank is kerfed longitudinally at 9 in order that when the stem 6 is forced into the bore 7 the head will be frictionally held in operative position on the body. Usually the diameter of the stem 6 will be slightly larger than that of bore 1 so that when the stem is forced into the bore the shank will be tensioned on and serve to hold the stem in position. In some cases the stem may be soldered to the shank or shrunk into position.

Thus, it will be observed that a tool embodying my invention economizes in the quantity of metal used for the reason that the same body may be used with many difierent riveting heads and there is no appreciable waste of materials. Also, no change is necessary in the riveting machines for adapting my tool to use in connection therewith.

What I claim is:

1. A rivet setting tool comprising: an integral body having a shank at one extremity provided with an axial bore, and a head having a stem detachably insertable in said bore and provided on its outer end with a die engageable with ends of rivets, for the purpose described, said shank having 'a longitudinal kerf extending from the open end of said bore to a point near the root of the bore.

2. A rivet setting tool comprising: an integral body having a shank atone extremity provided with an axial bore, and a head having a stem detachably insertable in said bore and provided on its outer end with a die engageable with ends of rivets, for the purpose described, said shank having a longitudinal kerf extending from the open end of said bore to a point near the root of the bore, the relative diameters of the bore and the stem being such as to tension the shank on the head when the head is operatively mounted on the body of the tool.

3. A rivet setting tool comprising a body having a stem for attachment to a rivetingmachine, an external flange for limiting the thrust of the tool in the direction of the riveting machine, and a shank having an axial bore open at its end and a longitudinal kerf extending throughout at least a major portion of the depth of said bore, and a head having a stem frictionally and detachably held in said bore and provided on its outer end with a setting die.

4. A rivet setting tool comprising: a body formed with a stem attachable to a'riveting m'achine, a shank "for supporting a setting die and a flange intermediate said stem and said shank, and a setting die fixedly held on but detachable from said shank at will, as described, said shank and said die having complementary telescoping portions, and means on the shank for rigidly holding the die on the shank for use, said means including a longitudinally disposed kerf formed in the shank for permitting the expansion and contraction of the shank to accommodate the 10 complementanr portion of the die.

HAROLD W. YOUNG. 

